Forest in the Sky

Last modified by the author on 20/06/2019 - 18:36

New Construction

  • Building Type : Collective housing > 50m
  • Construction Year : 2018
  • Delivery year : 2018
  • Address 1 - street : Dai Lai 100000 VINH PHUC, Other countries
  • Climate zone : [Cwa] Mild, dry winter, hot and wet summer.

  • Net Floor Area : 22 838 m2
  • Number of Dwelling : 181 Dwelling

Proposed by :

Certifications :

  • Primary energy need
    (Calculation method : )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

Developed by Flamingo Dai Lai Joint Stock Company, Forest in the Sky is a unique real estate project with advanced green technologies located in Hanoi.

Vietnam’s Coteccons served as the construction contractor for the eco-friendly complex. Forest in the Sky pioneers a new sustainability standard for Vietnam, emphasizing a visual appeal that is grounded in durability, comfort and energy and water-conserving features.

With its distinctive architecture, the four sides of Forest In The Sky are covered with over 50,000 trees, including shrubs, vines and colorful flowers. From a distance, the building resembles a tropical jungle full of vitality and brilliance. From within the building, residents can enjoy a panoramic view of Dai Lai Lagoon and Tam Dao Range.

Residents benefit from lower utility bills as all homes feature energy-efficient lighting, external window shading and high-efficiency hot water boilers, ensuring the building is as “green” on the inside as it is on the outside.

Forest in the Sky has received final EDGE certification from SGS Vietnam.

See more details about this project


Photo credit

Photos Courtesy of Flamingo Group


Construction Manager


Energy consumption

    Energy consumption of building Flamingo Dai Lai

    4 kWh/m2/year : cooling energy
    16 kWh/m2/year : home appliances
    4 kWh/m2/year : common amenities
    8 kWh/m2/year : Lighting
    4 kWh/m2/year : Hot water

Envelope performance

    Roof U - Value : 1.73 W/m² K
    Wall U - Value : 1.80 W/m² K
    Glass U - Value: 5.40 W/m² K

Real final energy consumption

    36,62 kWhfe/m2.year


    • No heating system
    • Heat pump
    • Solar Thermal
    • VRV Syst. (Variable refrigerant Volume)
    • Natural ventilation
    • No renewable energy systems


    Reduced Window to Wall Ratio - WWR of 32.43%
    Reflective Paint for External Walls -Solar Reflectivity (albedo) of 70
    Air Conditioning System - COP of 4.1
    Heat Pump for Hot Water - COP of 4.1
    Energy-Saving Light Bulbs - Internal Spaces/ Common Areas and External Spaces
    Solar Hot Water Collectors - 25% of Hot Water Demand

    Finishing work / Plumbing - Sanitary equipment

    Low-Flow Showerheads - 9 L/min
    Low-Flow Faucets for Kitchen Sinks -6.8 L/min
    Low-Flow Faucets for Washbasins - 4.9 L/min
    Single Flush for Water Closets - 4.8 L/flush

    Finishing work / Partitions, insulation

    Insulation of Roof - U Value of 3.14
    Insulation of External Walls - U Value of 1.92
    Internal Walls: Cellular Light Weight Concrete Blocks

Construction and exploitation costs

Energy bill

  • 30 578,00

Life Cycle Analysis

    Arch. Maria Chiara Pastore of Stefano Boeri Architetti, famous for creating the vertical forests model for sustainable residential buildings embodied by Milan’s Bosco Verticale (Vertical Forest), emphasized how its vegetal system contributes to the construction of a microclimate, produces humidity, absorbs CO2 and dust particles and produces oxygen.

    This is not only instrumental in curbing climate change but also utilises accessible building materials for large-scale construction projects. Compared to concrete, steel, cement and glass, wood requires less energy to produce and stores – rather than emits - carbon.

    Dr Michael Ramage, Director of the Centre for Natural Material Innovation at the University of Cambridge, instrumental in the design of the “The Toothpick” (a wooden skyscraper set to become the second tallest building in London), discussed “super-tall timber”. He explained how wood construction involves cross-laminated timber, a material made of many sheets of wood glued and compressed together, is stronger than steel and a viable candidate for building skyscrapers

Water management

  • 16 769,00 m3
  • 39 kL/unit/year: shower
    21 kL/unit/year: kitchen
    16 kL/unit/year: water faucets
    20 kL/unit/year: water closets
    38 kL/unit/year: washing and cleaning

Indoor Air quality

    Integrating urban forests into architecture leads to breathtaking results. Sometimes referred to as treescrapers, these buildings have plenty to offer beyond their unique architecture. Implementing sustainable principles, they are a breath of fresh air in high density cities — literally. Urban forests provide us with better air quality by increasing the available oxygen. Also, they ensure a safe habitat for animals that in most cases wouldn’t survive the harsh conditions of crowded cities.

GHG emissions

  • 29,34 KgCO2/m2/year
  • CO2 Emissions g/kWh of Electricity: 815 g/kWh

Reasons for participating in the competition(s)

?Energy (42% energy savings) : Reduced window to wall ratio; reflective paint for external walls; insulation of roof and external walls; energy-efficient air conditioning system; energy-efficient heat pump for hot water; solar hot water collectors; and energy-saving lighting for internal spaces, common areas and external spaces. 
Water (22% water savings): Low-flow plumbing fixtures for washbasins and kitchens and water-conserving water closets. 
Materials (36% less embodied energy in materials): Cellular lightweight concrete blocks and a thinner, in-situ reinforced concrete slab for floor slabs and roof construction

Building candidate in the category

Energy & Hot Climates

Energy & Hot Climates

Health & Comfort

Health & Comfort

Users' Choice

Users' Choice

Green Solutions Awards 2019 - Buildings

Share :
Author of the page

EDGE Buildings

Other case studies



Green Solutions Awards 2019 - Buildings